Adjustable direct endoscopic optical coupler



FIG. 1 is a right side elevational view of an adjustable direct endoscopic optical coupler, showing my new design, the left side being a mirror image thereof;

FIG. 2 is a top plan view, the bottom view being symmetrical;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof. 

The ornamental design for an adjustable direct endoscopic optical coupler, as shown and described. 